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Path MTU discovery fixes and improvements (#3109)

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- Existing option `WIREGUARD_MTU` , if set, disables PMTUD and is used
- New option `PMTUD_ICMP_ADDRESSES=1.1.1.1,8.8.8.8` and `PMTUD_TCP_ADDRESSES=1.1.1.1:443,8.8.8.8:443`
- ICMP PMTUD now targets external-by-default IP addresses
- New TCP PMTUD (binary search only) as a second MTU confirmation and fallback mechanism.
- Force set TCP MSS to MTU - IP header - TCP base header - "magic 20 bytes" 🎆
- Fix #3108
This commit is contained in:
Quentin McGaw
2026-02-15 01:40:34 +01:00
committed by GitHub
parent 8f1fda7646
commit be92aa2ac4
59 changed files with 2050 additions and 376 deletions
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.devcontainer/Dockerfile
+1 -1
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@@ -1,2 +1,2 @@
FROM ghcr.io/qdm12/godevcontainer:v0.21-alpine
RUN apk add wireguard-tools htop openssl
RUN apk add wireguard-tools htop openssl tcpdump